Revert "Check for zero length python.exe"
Revert "Check for zero length python.exe"

This reverts commit 2a4a24ba03201c7d2313ef978c0bb3608c9cfa09.

If somebody has actually installed the store python this will prevent
them from using it, which is not helpful. So, I'm reverting this change
and if an uninstalled Python gets invoked that is Microsoft's fault (and
can be avoided by installing the store version of python).

google/UIforETW,google/UIforETW,google/UIforETW,google/UIforETW